## Version 1.0.0

Code Download

• Single
• Double

### MC33 Sparse unsymmetric matrix: permute to bordered block triangular form

This subroutine ﬁnds row and column permutations that reorder an $m$ by $n$ sparse matrix to a bordered block triangular form with full diagonal blocks, or a nested bordered block triangular form with each block itself in bordered block triangular form.